*{
    margin: 0;
    padding: 0;
    list-style: none;
    box-sizing: border-box;
}
#zuo{
    width: 25%;
    height: 100%;
    background: #fff;
    overflow: hidden;
    overflow-y: scroll;
    scrollbar-width: none;
}
#you{
    width: 20%;
    height: 100%;
    background: #fff;
}
#zuo-cebianlan{
    width: 60px;
    background: #fff;
    border-right: 1px solid #eee;
}
#zuo-cebianlan ul{
    display: flex;
    flex-direction: column;
}
#zuo-cebianlan ul li{
    height: 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 15px 0px;
}
#zuo-cebianlan ul li img{
    width: 25px;
    height: 25px;
}
#zuo-sucai{
    flex: 1;
}
#zhong{
    flex: 1;
    height: 100%;
}
#zhong-box img{
    width: 40px;
    height: 40px;
}
